Soldier fly larvae as feed in commercial fish production

Aquaculture ◽  
1981 ◽  
Vol 24 ◽  
pp. 103-109 ◽  
Author(s):  
K. Bondari ◽  
D.C. Sheppard
Keyword(s):  
Fish Production ◽  
Commercial Fish ◽  
Fly Larvae

Bacterial Counts of Commercial Fish Diets

1971 ◽  
Vol 28 (8) ◽  
pp. 1185-1189 ◽  
Author(s):  
T. J. Trust
Keyword(s):  
Fluorescent Pseudomonads ◽  
Total Count ◽  
Aerobic Bacteria ◽  
Fish Production ◽  
Commercial Fish ◽  
Fish Diets ◽  
Thermophilic Species ◽  
Aerobic And Anaerobic ◽  
Spore Forming Bacteria ◽  
Representative Samples

Two diets formulated and offered for commercial fish production were examined to determine their microbial burden. The total count of aerobic bacteria ranged from 103 to 107 bacteria per gram of diet. The diets contained psychrophilic and thermophilic species and up to 104 aerobic and anaerobic spore-forming bacteria per gram. Enterococci and members of the Enterobacteriaceae, including species of Salmonella, were also present. Fluorescent pseudomonads were detected in 18 of the 47 samples tested, Proteolytic, amylolytic, lipolytic, and haemolytic organisms were shown to be present in measurable numbers. The total viable aerobic count did not change markedly on storage of representative samples at 4, 20, or 30 C.

Sanitation of fish farms and prevention of fish diseases by pond drying with the use of fish and grass rotation

2016 ◽  
Vol 3 (3) ◽  
pp. 380-384
Author(s):  
Наумова ◽  
A. Naumova ◽  
Наумова ◽  
A. Naumova
Keyword(s):  
Comparative Research ◽  
Silver Carp ◽  
Fish Farm ◽  
Fish Production ◽  
Fish Ponds ◽  
Fish Farms ◽  
Commercial Fish ◽  
Causative Agents ◽  
Annual Frequency ◽  
One Year

Objective of research: to present the actuality and novelty of application of fish and grass “rotation” because this allows to reveal new data on pond drainage planning which is the most effective in sanitation of the fish farm. Materials and methods: to determine the most effective cycle for the summer drying of ponds, we studied ecological and epizootological features of fishing ponds, which had been used after drying within 1 and 5 years. As research object served 8 fish ponds: 4 drained ponds under crop (40 ha), 4 — overflowed (40 ha) and filled with one-year carps (2,5-З thousand ind./ha) and silver carps (1,2-1,4 thousand ind./ha). Results and discussion: The results of comparative research on anti-epizootic efficacy of pond drying at different periodicity of 1 and 5 years with the use of fish and grass “rotation” are provided. Data on decreased invasion of fishes (carp, silver carp) by parasites, absence of causative agents of infection, improved blood indicators, increased fish production at annual pond drying (with the use of fish and grass “rotation”) compared with the pond drying of 5 year periodicity are presented. Advantages of economic efficacy of the annual frequency of pond drying are confirmed: twice increased commercial fish production; reduced expenses for purchase of food (own barley and wheat production), drugs, disinfectants, fertilizers that allow increasing economic revenue and making profit.

scholarly journals Growth, immune status and intestinal morphology of Nile tilapia fed dietary prebiotics (mannan oligosaccharides-MOS)

2017 ◽  
Vol 43 (5) ◽  
pp. 944-952
Author(s):  
Ricardo Yuji-Sado ◽  
Fernanda Raulino-Domanski ◽  
Patricia Franchi De Freitas ◽  
Francielli Baioco-Sales
Keyword(s):  
Immune System ◽  
Best Management Practices ◽  
Nile Tilapia ◽  
Management Practices ◽  
Health Management ◽  
Intestinal Morphology ◽  
Fish Growth ◽  
Fish Production ◽  
Commercial Fish ◽  
Mannan Oligosaccharides

Farmers must conform to Best Management Practices in fish production such as the development of non-antibiotic dietary supplements for fish growth and health management. We determined the effects of increasing levels of dietary mannan oligosaccharides on growth, immune system and intestine integrity of Nile tilapia. Fish (49.6 ± 10.8 g) were randomly distributed into 12 tanks (250 L; 20 fish per tank) and fed during 60 days with a practical diet supplemented with 0.0, 0.2, 0.4 and 0.6% dietary mannan oligosaccharides (n = 3). Fish growth and immune system were not affected (P > 0.05) by treatments. Fish fed 0.4% prebiotic supplementation presented increased (P < 0.05) intestinal fold height. Moreover, the intestine muscular layer thickness was increased in fish fed 0.4 and 0.6% dietary prebiotic. After 60 days, there were no effects on intestinal morphology. Studies regarding characterization of intestinal microbiota and experiment that reproduce commercial fish production systems hearing conditions are necessary to determine the effective use of this dietary supplement for the species.

Measuring the initial economic effects of hurricanes on commercial fish production: the US Gulf of Mexico grouper (Serranidae) fishery

2012 ◽  
Vol 66 (2) ◽  
pp. 271-289 ◽  
Author(s):  
Daniel Solís ◽  
Larry Perruso ◽  
Julio del Corral ◽  
Brent Stoffle ◽  
David Letson
Keyword(s):  
Gulf Of Mexico ◽  
Economic Effects ◽  
Fish Production ◽  
Commercial Fish ◽  
The Us

scholarly journals EFFICIENCY OF RAINBOW TROUT CULTIVATION IN THE RECIRCULATING WATER SUPPLY FACILITY WITH THE USE OF STATE SUPPORT (WITH THE SARATOV REGION AS A CASE STUDY)

Fisheries ◽  
2020 ◽  
Vol 2020 (3) ◽  
pp. 117-120
Author(s):  
Alexey Vasilyev ◽  
Olga Rudneva ◽  
M. Rudnev
Keyword(s):  
Rainbow Trout ◽  
Water Supply ◽  
Federal District ◽  
Fish Production ◽  
Competitive Advantages ◽  
Retail Sale ◽  
State Support ◽  
Commercial Fish ◽  
Saratov Region

The article deals with the dynamics of commercial fish production in Russia, the Volga Federal district and the Saratov region. Dynamics of retail sale of fish is given. Two variants of the project of rainbow trout cultivation in recirculating water supply facilities aimed at 50 tons of fish a year with and without use of the state grants are offered. The main competitive advantages of rainbow trout cultivation are presented. The indicators of economic efficiency of the project are given.

Zooplankton and Potential Fish Production in Lake Ontario

1984 ◽  
Vol 41 (9) ◽  
pp. 1303-1309 ◽  
Author(s):  
U. Borgmann ◽  
H. Shear ◽  
J. Moore
Keyword(s):  
Lake Ontario ◽  
Crustacean Zooplankton ◽  
Published Data ◽  
Total Production ◽  
Fish Production ◽  
Commercial Fish ◽  
Diacyclops Thomasi ◽  
Commercial Harvest ◽  
Recent Estimate ◽  
Fish Harvest

We calculated the annual production of epilimnetic crustacean zooplankton in Lake Ontario from data on the abundance of each species and its eggs, and from predictions of egg development times. Bosmina longirostris is the most productive species at the nearshore stations whereas Diacyclops thomasi is the most productive offshore. Total crustacean zooplankton production is fairly uniform throughout the lake, both nearshore and offshore, with the possible exception of somewhat reduced production at the western end of the lake. Average total production was estimated at 15 g∙m−2∙yr−1. Using a recent estimate of particle-size-conversion efficiency in Lake Ontario, obtained from data on contaminant concentrations in aquatic biota, we predicted potential fish production in the lake for various sizes of fish. From published data on the commercial fish harvest from 1910 to 1930, a time period when commercial production was at a maximum, we estimate that the past commercial harvest for pelagic species may have been 20% or more of our predicted potential production.

scholarly journals Characterization of the commercial fish production landed at Manaus, Amazonas State, Brazil

2003 ◽  
Vol 33 (1) ◽  
pp. 53-66 ◽  
Author(s):  
Vandick da Silva BATISTA ◽  
Miguel PETRERE JÚNIOR
Keyword(s):  
Amazon Basin ◽  
Annual Variation ◽  
Total Production ◽  
Fish Production ◽  
Seasonal Component ◽  
Commercial Fish ◽  
Colossoma Macropomum ◽  
Or Groups ◽  
Amazonas State

The present work aims to update a series of information about the regional fishing production, by presenting and characterizing the contribution of the different sub-systems of the Amazon basin to the catch landed at the main fishing market of Manaus, Brazil, from 1994 to 1996. Collectors specifically hired for this function registered key information on the fisheries. Thirty nine types or groups of fish were found in the fishing production landed. Jaraqui (Semaprochilodus spp.), curimatã (Prochilodus nigricans), pacu (Myleinae), matrinchã (Brycon cephalus), sardine (Triportheus spp.), aracu (Anostomidae) and tambaqui (Colossoma macropomum) were the most important items during three consecutive years. In 1994 these items summed up 91.6% of the total production; in 1995 and 1996 these values were, respectively, 85.3% and 86.4% of the total production. Tambaqui landed decreased remarkably during the period 1976-1996. There was a strong seasonal component in the production of the main species; jaraqui and matrinchã were mostly landed between April and June, while curimatã, pacu, and sardine were mostly landed during the dry season. Other important items showed a strong inter-annual variation in their production. The fishing production landed came mostly from the sub-system of the Purus River (around 30% of the total production). The subsystem of the Medium-Solimões contributed with an average of 15% and the sub-systems of the Madeira, Lower-Solimões, Upper-Amazon and Juruá, together contributed with 11.5% of the total production landed. Finally, the remaining sub-systems contributed with only 7.6% of the production.

SEM of Hepatocytes and Biliary Passages in Goldfish Liver

1977 ◽  
Vol 35 ◽  
pp. 556-557
Author(s):  
Waykin Nopanitaya ◽  
Joe W. Grisham ◽  
Johnny L. Carson
Keyword(s):  
Carassius Auratus ◽  
Cell Layer ◽  
Three Dimensional ◽  
Cell Types ◽  
Biliary System ◽  
Fish Food ◽  
Commercial Fish ◽  
Goldfish Carassius Auratus ◽  
Commercial Fish Food

An interesting feature of the goldfish liver is the morphology of the hepatic plate, which is always formed by a two-cell layer of hepatocytes. Hepatic plates of the goldfish liver contain an infrequently seen second type of cell, in the centers of plates between two hepatocytes. A TEH study by Yamamoto (1) demonstrated ultrastructural differences between hepatocytes and centrally located cells in hepatic plates; the latter were classified as ductule cells of the biliary system. None of the previous studies clearly showed a three-dimensional organization of the two cell types described. In the present investigation we utilize SEM to elucidate the arrangement of hepatocytes and bile ductular cells in intralobular plates of goldfish liver.Livers from young goldfish (Carassius auratus), about 6-10 cm, fed commercial fish food were used for this study. Hepatic samples were fixed in 4% buffered paraformaldehyde, cut into pieces, fractured, osmicated, CPD, mounted Au-Pd coated, and viewed by SEM at 17-20 kV. Our observations were confined to the ultrastructure of biliary passages within intralobular plates, ductule cells, and hepatocytes.

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